(13) باب السُّؤَالِ بِأَسْمَاءِ اللَّهِ تَعَالَى، وَالاِسْتِعَاذَةِ بِهَا
Narrated Anas:
The Prophet (ﷺ) slaughtered two rams as sacrifice and mentioned Allah's Name and said, "Allahu-Akbar" while slaughtering).
Reference: Sahih al-Bukhari 7399
In-book reference: Book 97, Hadith 28
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 9, Book 93, Hadith 496